Qualitative identity, qualitative identity and equivalence conservation were assessed in 60 retarded boys and girls in three groups (mental ages 5.4, 6.3, and 7.5). Half the subjects were provided a memory aid while the other half were not. (MS)

This study investigated the influence of knowledge of conservation on recall of an event by 4- to 7-year-old children. Changes in recall over time were found to follow an inconsistent pattern and seemed to be unrelated to changes in the subject's stage of development. (Author/JMB)

Suggests some difficulties and challenges in understanding and teaching Piaget's new theory. Outlines some differences between Piaget's new and standard theories, such as the diminished status of the emergent skills that mark the onset of concrete operational thinking and the perception of achievements in concrete operations as empirical…

Studied the gestures of blind, sighted, and blindfolded sighted 10- through 12-year olds as they engaged in narration, direction giving, or conservation tasks. Found that blind children produced gestures, though not in all contexts in which sighted children produced gestures; and that blind children's gestures resembled sighted children's gestures…

Findings on 20 children who passed an area conservation task and 20 who didn't suggested that conserving children applied an additive rule, while nonconserving children presented patterns suggesting centration on one of the two dimensions. Implications for Anderson's and Piaget's conceptions of conservation development are discussed. (RH)

Outlines the use of the toy popularly known as Newton's Cradle or Newton's Balls in illustrating the laws of conservation of momentum and mechanical energy. Discusses in detail the joint effects of elasticity, friction, and ball alignment on the rate of damping of this apparatus. (JRH)

Preschoolers made judgments about solutions in which substances were dissolved. Preschoolers (1) distinguished visual appearance from underlying reality; (2) recognized the conservation of taste, smell, and dangerous properties; and (3) by age five recognized that matter can be decomposed into pieces too tiny to be seen by the naked eye. (BC)

Children between 7 and 11 years of age with moderate learning difficulties were tested for conservation. Nonconservers were divided into experimental and control groups. Experimental group children performed conservation tasks with conserving children in their class. Posttests indicated that the increase in performance in conservation tasks was…

This study was designed to determine the age relationships for each type of perceptual strategy used by nonconserving children during tests of conservation of quantity. The results indicate that the type of perceptual strategy reflected in children's answers varied with their age. (JMB)

Concludes that despite a significant relationship between conservation and intelligence, neither is a significant predictor of reading achievement. (RB)

Identifies the concept of reversibility (an awareness of the prior situation after a transformation of shape) as an area of difficulty in the Piagetian concept of transitional conservation. (RB)

A study of the effects of three types of conservation judgments (qualitative, quantitative, and equivalence) on both continuous and discontinuous substances in 24, 4-, 5-, and 6-year-olds. Subjects were tested on conservation ability with and without verbal justification. Half of the subjects were provided a memory aid, the other half were not.…

Many conservation studies have been performed using time consuming individual testing. The sequential studies reported in this paper describe the development of a group film test of conservation. (Author)

An investigation of the role of an atomistic view of material substance in the development of conservation of continuous quantity in young children. Piagetian tasks using blocks, coarse salt and water were presented to a total of 180 kindergarten, first, and second grade children. Results indicate that tasks using blocks were the easiest. (ED)

Based on author's PhD dissertation, University of California, Los Angeles (1967).